Product Overview

The SIMATIC S7-300 SM 332 is a precision analog output module offering 2 isolated output channels, configurable for both voltage and current applications. With selectable ranges and high-resolution performance, it integrates seamlessly into modular S7-300 automation systems. Notably, it supports hot-swap capability, allowing removal or insertion while the backplane is active—ideal for minimizing system downtime.

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Key Specifications & Features

Power & Wiring

Supply Voltage (L+): 24 V DC with reverse-polarity protection

Input Current:

From L+ (no load): ≤ 135 mA

From backplane (5 V DC): ≤ 60 mA

Typical Power Loss: ~3 W

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Analog Output Channels (2 AO, U/I)

Configurable Output Ranges:
Voltage: 0–10 V, 1–5 V, ±10 V
Current: 0–20 mA, ±20 mA, 4–20 mA

Protection & Limitations:
Short-circuit protected voltage outputs (max. 25 mA)
No-load current output voltage up to 18 V

Load Requirements:
Voltage: ≥ 1 kΩ; capacitive ≤ 1 µF
Current: ≤ 500 Ω; inductive ≤ 10 mH

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Performance & Accuracy

Resolution: 11-bit + sign (±10 V, ±20 mA, etc.), 12-bit (0–10 V, 0–20 mA)

Speed:
Conversion: 0.8 ms per channel
Settling Time: resistive 0.2 ms, capacitive 3.3 ms, inductive (1 mH) 0.5 ms, (10 mH) 3.3 ms

Accuracy:
Voltage drift over temp: ±0.5%
Voltage basic error at 25 °C: ±0.4%
Current drift over temp: ±0.6%; basic error: ±0.5%

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Diagnostics & Isolation

Diagnostics: Parameterizable diagnostic functions and alarms, with group error (SF) LED indicator

Isolation: Full galvanic isolation between outputs and backplane, tested to 500 V DC

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Mechanical Data

Dimensions: 40 mm (W) × 125 mm (H) × 117 mm (D)

Weight: Approximately 220 g

Installation: 20-pin front connector; hot-swappable during operation

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Lifecycle & Logistics

Lifecycle Status: Being phased out as of October 1, 2023 (PLM: PM400)

Availability: Ships ex-works in 1 day; packaged dimensions approx. 13.1 × 15.2 × 5.2 cm; net weight 0.246 kg

Origin: Germany

Compliance:

RoHS since March 31, 2008

WEEE Take-back obligation applies

Contains substances listed under REACH Article 33 (Lead); safe when used and disposed as intended

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Engineering Highlights

Dual-Mode Outputs for Versatile Integration
Each channel’s ability to switch between voltage and current outputs supports a wide range of actuator types without additional modules.

High Precision with Fast Response
With crisp conversion speed and tight accuracy, it’s well-suited for closed-loop systems requiring responsive and accurate analog feedback.

Live Replacement Capable
The hot-swap-enabled design significantly improves maintainability and reduces downtime in critical systems.

Built-in Diagnostics and Safety
Advanced error handling and isolation features enhance operational reliability and make fault detection straightforward.

Compact & Efficient Integration
Its small form factor ensures that analog capability can be added even in high-density S7-300 racks without compromising footprint.

Suggested Product Page Description

SIMATIC S7-300 Analog Output Module — SM 332 (2 AO, U/I, 11/12-Bit), 20-Pin (6ES7332-5HB01-0AB0)
This compact analog output module delivers two configurable, highly accurate analog outputs (voltage/current) within the S7-300 architecture. With robust protection, full galvanic isolation, hot-swappable installation, and detailed diagnostics, it’s designed for precision, reliability, and seamless operation. Despite nearing phase-out, it remains essential for maintaining legacy automation systems.

Key Highlights:

Two isolated analog channels, switchable between voltage and current

High resolution with fast 0.8 ms per channel conversion time

Diagnostics with SF LED; strong protection and isolation

Hot-swappable during live backplane operation

Compact, German-made design with fast shipping

Meets RoHS, WEEE, REACH compliance standards